Sunflower
-
Upload
md-rubel-hossain -
Category
Science
-
view
266 -
download
3
description
Transcript of Sunflower
1
Welcome to my presentation
Good Afternoon
&
2
Presented by:
Md. Rubel Mia12309056
3
Topic name:
Diseases of Sunflower & Their Management.
4
Content
About Sunflower
List of the diseases by pathogen
Symptoms & management of diseases
Pictures of some diseases
5
About Sunflower
English name: Sunflower
Scientific name: Helianthus annuus
Family: Asteraceae
Genus: Helianthus
6
List of sunflower diseases
Bacterial diseasesApical chlorosis Pseudomonas syringae pv. tagetis
Bacterial leaf spot Pseudomonas syringae pv. helianthi
Bacterial wilt Pseudomonas solanacearum
Crown gall Agrobacterium tumefaciens
7
Fungal diseases
Alternaria leaf blight Alternaria alternataDowny mildew Plasmopara halstediiPowdery mildew Erysiphe cichoracearumRust Puccinia helianthiSeptoria leaf spot Septoria helianthi
8
Nematodes
Pin Paratylenchus projectusLesion Pratylenchus hexincisus
Root knot Meloidogyne arenariaSpiral Helicotylenchus sp.Stunt Quinisulcius acutus
9
Viral diseases:
Aster yellows Aster yellows phytoplasmaSunflower mosaic Cucumber mosaic virus
Sunflower virus Tobacco mosaic virus
Chlorotic Mottle Sunflower Chlorotic Mottle virus (SuCMoV)
10
charcoal rot - Rhizoctonia bataticola
11
Management
Closer planting of the seedling should be avoided.
Treat the seeds with Carbendazim or Thiram at 2/kg
Symptoms
• The pathogen is seed-borne and primarily causes seedling blight
• The grown up plants also show symptoms after flowering stage.
12
Leaf blight - Alternaria helianthi
13
• The pathogen produces brown spots on the leaves, but the spots can also be seen on the stem, sepals and petals.
• The lesions on the leaves are dark brown with pale margin surrounded by a yellow halo.
Symptoms ManagementDeep summer
ploughing.Proper spacingClean cultivation
and field sanitation.
14
Rust - Puccinia helianthi
15
• Small, reddish brown pustules covered with rusty dust appear on the lower surface of bottom leaves.
• The black coloured telia are also seen among uredia on the lower surface.
Symptoms ManagementPrevious crop remains
should be destroyed.Removal of crop
residuesSpray Mancozeb at
2kg/ha.
16
Powdery mildew - Erysiphe cichoracearum
17
• The disease produces white powdery growth on the leaves White to grey mildew on the upper surface of older leaves.
Symptoms Management
Complete field and crop sanitation.
Early varieties should be preferred.
18
Head rot - Rhizopus sp.
19
Basal rot - Sclerotium rolfsii
20
Necrosis -Tobacco streak virus (TSV)
21
Have you any question ?
22
Thanks to all